package com.linxianqin.springbootVue.controller.common;

import com.linxianqin.springbootVue.domain.constant.CacheStants;
import com.linxianqin.springbootVue.domain.constant.Constants;
import com.linxianqin.springbootVue.domain.model.AjaxResult;
import com.linxianqin.springbootVue.service.CacheService;
import com.linxianqin.springbootVue.utils.sign.Base64;
import com.linxianqin.springbootVue.utils.uuid.IdUtils;
import java.awt.image.BufferedImage;
import java.io.IOException;
import javax.annotation.Resource;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletResponse;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.util.FastByteArrayOutputStream;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import com.google.code.kaptcha.Producer;

/**
 * 功能描述：验证码操作处理
 * @author lxq
 * @version 1.00
 * @Date 2020/12/13
 */
@Slf4j
@RestController
public class CaptchaController {
    @Resource(name = "captchaProducer")
    private Producer captchaProducer;

    @Resource(name = "captchaProducerMath")
    private Producer captchaProducerMath;

    @Autowired
    private CacheService cacheService;

    // 验证码类型
    @Value("${springbootVue.captchaType}")
    private String captchaType;


    @GetMapping("/captchaImage")
    public AjaxResult getCode(HttpServletResponse response) throws IOException {
        // 保存验证码信息
        String uuid = IdUtils.simpleUUID();
        log.info("UUID:{}",uuid);
        String verifyKey = Constants.CAPTCHA_CODE_KEY + uuid;
        String capStr = null, code = null;
        BufferedImage image = null;
        // 生成验证码
        if ("math".equals(captchaType))
        {
            String capText = captchaProducerMath.createText();
            capStr = capText.substring(0, capText.lastIndexOf("@"));
            code = capText.substring(capText.lastIndexOf("@") + 1);
            image = captchaProducerMath.createImage(capStr);
        }
        else if ("char".equals(captchaType))
        {
            capStr = code = captchaProducer.createText();
            image = captchaProducer.createImage(capStr);
        }
        cacheService.put(CacheStants.CAPTCHA_CACHE,verifyKey,code);
        log.info("存入的code：{}",code);
        log.info("存入的verifyKey：{}",verifyKey);
        // 转换流信息写出
        FastByteArrayOutputStream os = new FastByteArrayOutputStream();
        try
        {
            ImageIO.write(image, "jpg", os);
        }
        catch (IOException e)
        {
            return AjaxResult.error(e.getMessage());
        }

        AjaxResult ajax = AjaxResult.success();
        ajax.put("uuid", uuid);
        ajax.put("img", Base64.encode(os.toByteArray()));
        return ajax;
    }
}
